Character mistake: When Tommy walks into the flower shop, he tells the clerk that his sister is getting married. For the purpose of their mission, Sally, the sister in question, is actually supposed to be Tommy's aunt. (00:05:20)
Character mistake: When Tommy asks Don how he knows his I.D. is fake, Don says it's because he used to date Tommy's sister Sally. Sally, for the purpose of the aliens' mission to study Earth, is supposed to be Tommy's aunt. (00:14:25)
Dick's Ark - S6-E12
Character mistake: Sally tells Dick that he's jealous of her gig as a weather girl because he's never been on TV. However, Dick did appear on TV as a panellist on a talk show highlighting Dr. Strudwick's physics book in the season 4 episode Dick vs. Strudwick. Dick ended up turning the show into a Jerry Springer-like fiasco, and Sally even attended the taping. (00:10:40)